Ask Allie: How to Style Birkenstocks | Wardrobe Oxygen: Ask Allie: How to Style Birkenstocks (Discussed in episode 9 of the Pop Fashion podcast) Birkenstock, Denim, Sandals, Summer, Outfits, How To Wear Birkenstock Sandals, How To Wear Birkenstock, Birkenstock Sandals, Birkenstock Sandals Outfit